Albert c



(No Model.) A. G. OALKINS.

SAWING MACHINE.

Patented Mar. 9, 1897.

Elm 578,625.

v I/Vl/EIVTOR v WITNESSES:

ATTORNEYS.

'UNITED STATES PATENT FFICE.

ALBERT O. CALKINS, OF SANTA BARBARA, CALIFORNIA, ASSIGNOR TO IVILLIAM S. DAY, OF SAME PLACE.

SAWlNG-MACHINE.

SPECIFICATION forming part of Letterslatent No. 578,625, dated March 9, 1897.

A pli ati fil d December 22, 1896. Serial No 616,620- (No model.)

To all whom, it may concern.-

Be it known that I, ALBERT O. OALKINs, of Santa Barbara, in the county of Santa Barbara and State of California, have invented a new and Improved Sawing-Machine, of which the following is a full, clear, and exact description.

My invention relates to an improvement in sawing-machines employing a reciprocal sawblade; and it consists of a supporting and a guiding mechanism for the saw by which it will be positively guided in an approximately straight line.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both the figures.

Figure 1 is a side elevation of the device with one of the supportin g-posts broken away at one point to better show the mechanism; and Fig. 2 is an end elevation, partly in section, upon the line 2 2 of Fig. 1.

The object of my invention is to provide a device which shall support and guide a crosscut-saw in an approximately straight line and shall take its motion from a wheel, crank, or other power device. This device may also be used in other places for transforming a rotary motion into a straight-line motion.

Two vertical posts A are used for supporting the mechanism and as guides upon which the frame may be raised or lowered. The frame consists of the slidable upper block B and a lower yoke E, spaced apart by the upright bars E, and said yoke, which is essentially V-shaped, has the ends of its parallel members loosely secured to the vertical posts A. The block B of this frame has a guide consisting of two bars 0, connected at their lower ends, which guide receives the sliding block 0. A pendulum-bar D is provided which is forked at cl to embrace the block 0 and is pivoted thereto, the lower end of the pendulum-bar being furcated to receive the pusher-bar J, whereon it is jointed, and one end of the pusher-bar is firmly secured to the heel of the saw K. The other end of the pusher-bar J is pivoted upon one end of the pitman L, that at its opposite end is loosely secured to the wrist-pin of a crank-wheel M, which may be actuated by any source of power and rotary motion.

Two pairs of supporting-bars G are pivoted to theyoke E at different points in its length. The bars of each pair are pivoted to the yoke upon opposite sides, and at their upper end are pivoted to a connecting bar or rod I, which is parallel with the bar J. One of these pairs of supporting-bars G is pivoted to the pendulum-bar D at a point near its middle, as is also one end of the parallel bar I, the other pair of supporting-bars Gr being pivoted at their upper ends to an auxiliary suspending or pendulum bar H, which at its lower end is pivoted to the bar J. The bars II and D are so connected that they remain parallel. It will be seen that by this form of connection when the saw is moved from the position shown in full lines in Fig. 1 to that shown in dotted lines the upper end of the supportingbars G will rise sufliciently to cause the lower ends of the pendulum-bar D and its auxiliary suspending-bar II to move in substantially a straight line, and this causes the saw K to be reciprocated in a straight line. These bars may be so proportioned that the motion of the saw'shall be absolutely in a straight line.

saw has an eye in the block B at its upper end, to which is attached a rope b, by which the frame may be moved up and down upon the posts A, so that it may be adjusted at any height.

In using the saw for cutting off logs it should point represented in the drawings when commencing the cuts. As'the log is cut in two the frame and the saw will be dropped until they reach the lowest point. The motion of the saw at all positions will, however, be a straight-line motion, this motion being that which produces the best results in cutting off the logs.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- In a sawing-machine, the combination with upright guides, a frame supported upon said guides and capable of vertical adjustment thereon, a yoke consisting of two parallel bars forming the lower part of said frame, a block sliding vertically in guides supported in the upper part of said frame, a pendulum-rod pivbe adjusted at a point considerably above the The described supporting-frame for the end of the second pair of supporting-bars and :o atits lower to the saw-frame, and means for reciprocating the saw, substantially as described.

ALBERT C. CALKINS.

l/Vitnessesz SIDNEY J. PARSONS, ALBERT J. SHERER. 

